[Twenty-years' experience of prevention and treatment of blindness in certain rural areas of Guangdong Province (author's transl)].
D000293:Adolescent; D000328:Adult; D000368:Aged; D001766:Blindness / Q000209:etiology / Q000517:prevention & control* / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D002681:China; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012423:Rural Health; D014141:Trachoma / Q000453:epidemiology